Whistler is a 27 year old Inkling that has been locked at 27 for 3 centuries and hasn't changed appearance wise, well, except for the part in 1752 which is why she's a female inkling
She Drives a 1934 Chevy Coupe. It is black and red with a Fire decal on the side. (Basic idea of the design of a '34 chevy coupe: )
Her TV is an RCA Color TV from 1957
She mostly likes to kill, though she only does it when it's needed to
She has been a victim of "Long-Exposure" to the older portals from 1786 - 1826, Though she has learned to control where she teleports now.